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  1. The long and short of science

    Editor in Chief Nancy Shute discusses the centennial of quantum mechanics’ framework, Hubble’s 35th anniversary and the legacy of Kanzi the bonobo.

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  2. Readers discuss the biology of sex, plastic in the brain and more

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  3. Math puzzle: The conundrum of sharing

    Solve the math puzzle from our June 2025 issue, in which friends must find ways to all enjoy hot mud beds.

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  4. Health & Medicine

    Wet fingers always wrinkle in the same way

    Pruney fingertips aren't swollen sponges — the wrinkles actually come from blood vessels constricting and pulling skin inward.